An Attendee should be able to register for more than one events
An event can have more than one attendees
An Event registration must have an event and an attendee
I should be able to define event registrations with information such as dietary needs of an attendee (Vegetarian, Gluten-free, Vegan, Diabetic, Other), registration fee, attendee type (Customer , Partner , Employee)
Registration fee should be predefined based on attendee type. This field can be overriden by the users: For Customer 100£ , for Partner 80£ , for Employee 60£